Bug report

Bug description:

A Task which issues acondition.notify(1) to wake up aTask from a set of waiting tasks to perform some task, e.g. consume a piece of data, may hit arace condition with a simultaneouscancel() of a task among the waiting tasks, resulting in none of the tasks
successfully returning fromcond.wait(). This is problematic because because thenotify() is essentially lost, and starvation/deadlocks may occur.

PR#112201 contains a fix, as well as documentation updates

CPython versions tested on:

CPython main branch

Operating systems tested on:

Windows

Linked PRs

• gh-112202: Ensure that condition.notify() succeeds even when racing with Task.cancel() #112201